"Cornelis J. de Brabander" <brabander@fsw.leidenuniv.nl>

Subject: Re:

-----Oorspronkelijk bericht----- Van: Martijn Pieters <mj@digicool.com> Aan: jiva@devware.com <jiva@devware.com>; zope@zope.org <zope@zope.org> Datum: zondag 27 februari 2000 10:57 Onderwerp: Re: [Zope] Building tables from a db in dtml...

[snip]

...

(untested):

<table><tr> <dtml-in db_query> <dtml-if "_['count-value'] % 4 == 0"></tr><tr></dtml-if> <td><dtml-var value></td> </dtml-in> </tr></table>

Now, I could be wrong and count-value is 1 based in stead of 0 based. In fact, I believe it is, it would make sense anyway. Then you'd adjust the logic slightly, something like (_['count-value'] - 1) % 4.

Count-xxx does not change during the sequence, it simply gives the number of non-missing xxx-values in the sequence. Furthermore, refering to the response of Jim Sanford, the solution can do without integer or sting conversions:

(tested!!!)

<TABLE> <dtml-in objectValues> <TR><TD><dtml-var sequence-number></TD> <TD> <dtml-if "_['sequence-number']!=0 and _['sequence-number']%2==0">even <dtml-else> odd </dtml-if> </TD></TR> </dtml-in> </TABLE>

Check out (for this purpose, anyway) sequence-odd and sequence-even in the DTML reference. To answer the original poster:: <dtml-if "_[ 'sequence-index' ] % 4 == 0"> </tr><tr> </dtml-if> should do fine. And to emulate Cato, Agnosciti invalidi delendi est ("Invalid identifiers must be destroyed"). I _hate_ the "sequence-foo" pseudo-identifiers in DTML, worse than any other feature of Zope. The only rational way to spell the above is:: <dtml-if "sequence_index % 4 == 0"> </tr><tr> </dtml-if> but that won't work (without enclosing it in a <dtml-let> which aliases 'sequence-index' as 'sequence_index'. -- ========================================================= Tres Seaver tseaver@palladion.com 713-523-6582 Palladion Software http://www.palladion.com